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Incandescent bulbs give about 10 lumens of light per watt of electric power
Halogens give about 13 lumens per watt
CFLs give about 50 lumens per watt
So it depends on the type of bulb.
Wiki User
∙ 11y ago
Wiki User
∙ 10y agohow many watts 1 lux
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How many 40-watt fluorescent lights can produce 1000 lux?
TWO
1 watt equal to how many lux?
Lux is unit for measuring the illumination (illuminance) of a surface. It is the amount of light received per unit of surface area. You can' t convert watt, which is power, to Lux.
What is measured in units of lux?
Lux is a measurement of light, the brightness at source. The higher the number the brighter the sourceIllumination, the light output of a light bulb.
How do you calculate lux value for a light fixture?
Lumens is the total amount of light a light source (a light bulb, for instance) throws in all directions. Lux (lumens per square meter) can measure how intense light from that light source is when looking toward it from a certain distance. Lux depends greatly on how far away you are from a light source. At any given instant, light is thrown from the source in a perfect sphere.If you are trying to calculate how many lumens your light bulb shines and you have a light meter that gives you lux, point your meter at the light, then take your lux multiply by 12.57 (pi times 4). Then, multiply this by the distance of your light meter from the light bulb (in meters) squared. That will give you the lumens of the light bulb. In equation form, where lm is lumens, r is your distance from the light source, and pi is (come on) about 3.14, lux=lm/(pi*4*(r^2)), or lm=lux*pi*4*(r^2). The (pi*4*(r^2)) part is used to calculate the surface area of a sphere around the light source.Note: this calculation does not account for reflected light, and will only work on an exposed light bulb. Lights housed in a reflective cone (like in a flashlight) are designed to project light in one direction and (within the spot where light is projected) will have a lux much higher at any given distance than if the light bulb wasn't housed in a cone.
How many lumens on sunny day?
The illuminance of direct sunlight is approximately 100,000 lux, but normal daylight, which is filtered through a cloudy sky, is between 5,000 and 10,000 lux, while moonlight can be as little as 0.25 lux. About 1000 Lumen is equal to direct bright daylight .
How many 40-watt fluorescent lights can produce 1000 lux?
TWO
1 watt equal to how many lux?
Lux is unit for measuring the illumination (illuminance) of a surface. It is the amount of light received per unit of surface area. You can' t convert watt, which is power, to Lux.
How many lux is a 250w halogen bulb?
6500lm to 7000lm
What are the release dates for 1000 Lux - 2009?
1000 Lux - 2009 was released on: USA: September 2009
What would you use to measure the brightness of a light bulb?
A lux or lumens meter or in terms of mesurements lux or lumens
What is measured in units of lux?
Lux is a measurement of light, the brightness at source. The higher the number the brighter the sourceIllumination, the light output of a light bulb.
How many lumens equal daylight?
The illuminance of direct sunlight is approximately 100,000 lux, but normal daylight, which is filtered through a cloudy sky, is between 5,000 and 10,000 lux, while moonlight can be as little as 0.25 lux. About 1000 Lumen is equal to direct bright daylight .
What is the lux or lumen level of a 18w and 36w and 58w t8 fluorescent tube and 13w and 18w plc reccessed downlight and 18w and 9w wall light and 8w exit light?
berapa besar Lux bohlam Metalhalide dibandingkan dengan lux bohlam PL-C 26 Watt
How many 100 watt lights would equal the brightness of the sun?
EXAMPLE: A certain 100-watt bulb emits a total luminous flux of 1200 lm, distributed uniformly over a hemisphere. Find the illuminance and the luminous intensity at a distance of 1 m, and at 5 m.SOLUTION: The area of a half-sphere of radius 1 m is(2[pi])(1 m)² = 6.28 m²The illuminance at 1 m isE = 1200 lm ÷ 6.28 m² = 191 lm/m² = 191 lux
How do you calculate lux value for a light fixture?
Lumens is the total amount of light a light source (a light bulb, for instance) throws in all directions. Lux (lumens per square meter) can measure how intense light from that light source is when looking toward it from a certain distance. Lux depends greatly on how far away you are from a light source. At any given instant, light is thrown from the source in a perfect sphere.If you are trying to calculate how many lumens your light bulb shines and you have a light meter that gives you lux, point your meter at the light, then take your lux multiply by 12.57 (pi times 4). Then, multiply this by the distance of your light meter from the light bulb (in meters) squared. That will give you the lumens of the light bulb. In equation form, where lm is lumens, r is your distance from the light source, and pi is (come on) about 3.14, lux=lm/(pi*4*(r^2)), or lm=lux*pi*4*(r^2). The (pi*4*(r^2)) part is used to calculate the surface area of a sphere around the light source.Note: this calculation does not account for reflected light, and will only work on an exposed light bulb. Lights housed in a reflective cone (like in a flashlight) are designed to project light in one direction and (within the spot where light is projected) will have a lux much higher at any given distance than if the light bulb wasn't housed in a cone.
How many lumens on sunny day?
The illuminance of direct sunlight is approximately 100,000 lux, but normal daylight, which is filtered through a cloudy sky, is between 5,000 and 10,000 lux, while moonlight can be as little as 0.25 lux. About 1000 Lumen is equal to direct bright daylight .
How do you find out lumen from lux?
There's not a direct conversion, but both are based on the candela, a unit of luminous intensity. There is a nice explanation of the difference between lumens and lux at http://en.wikipedia.org/wiki/Lumen_(unit).Lumens is the total amount of light a light source (a light bulb, for instance) throws in all directions. Lux (lumens per square meter) can measure how intense light from that light source is when looking toward it from a certain distance. Lux depends greatly on how far away you are from a light source. At any given instant, light is thrown from the source in a perfect sphere.If you are trying to calculate how many lumens your light bulb shines and you have a light meter that gives you lux, point your meter at the light, then take your lux multiply by 12.57 (pi times 4). Then, multiply this by the distance of your light meter from the light bulb (in meters) squared. That will give you the lumens of the light bulb. In equation form, where lm is lumens, r is your distance from the light source, and pi is (come on) about 3.14, lux=lm/(pi*4*(r^2)), or lm=lux*pi*4*(r^2). The (pi*4*(r^2)) part is used to calculate the surface area of a sphere around the light source.Note: this calculation does not account for reflected light, and will only work on an exposed light bulb. Lights housed in a reflective cone (like in a flashlight) are designed to project light in one direction and (within the spot where light is projected) will have a lux much higher at any given distance than if the light bulb wasn't housed in a cone.AnswerA lux is a special name given to a lumen per square metre. To convert lux to lumens, you need to multiply the illuminance (light arriving) on a surface, in lux, by the area of that surface, in square metres.
